Battery module and battery pack

Abstract

The utility model relates to the technical field of batteries, and discloses a battery module and a battery pack, the battery module comprises a battery cell group, the battery cell group comprises a plurality of battery cells arranged in sequence, a rigid insulating sheet is arranged between two adjacent battery cells, and the rigid insulating sheet can keep the distance between the two adjacent battery cells constant; the fixing assembly comprises a first fixing structure and a second fixing structure, and the first fixing structure is used for fixing the battery cell and the rigid insulating sheet; the second fixing structure is detachably arranged on the battery cell group and can fix the battery cell group in a shell of the battery pack, a first buffer structure is arranged between the second fixing structure and the battery cell group, the first buffer structure has deformation quantity allowing the battery cell group to move relative to the second fixing structure, and when the battery cell group moves, the deformation quantity of the first buffer structure is larger than that of the second fixing structure. And the battery cell and the rigid insulating sheet move synchronously. The utility model has the advantages that the structure can be simplified, the production cost can be reduced, and the convenience, the overall performance and the safety of the disassembly, assembly and maintenance of the battery cell group can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a battery module and battery pack. BACKGROUND

[0002] The battery module is by a plurality of battery monomer (electricity core) stacking, through CCS assembly to series parallel integration, with the function assembly of auxiliary structural member constitutes the intermediate unit, is the core module of battery pack, in the traditional design, a plurality of electricity core stacking usually needs to install the end cover at both ends, and uses the steel band to bundle and fixes the electricity core with the end cover, but this design has the problems such as complex structure, high production cost, to solve these problems, the prior art proposes the design scheme of using adhesive tape winding fixed electricity core stack, setting buffer foam among each electricity core, and the electricity core stack is bonded with the box through structural glue. However, the design saves the steel band and end cover and reduces the production cost, but still has the following problems: first, the structural glue after solidification is difficult to disassemble without damage, leading to difficult battery pack maintenance or recycling. Once a problem occurs in the electricity core, the entire battery pack may need to be replaced, increasing maintenance costs and resource waste. Secondly, the thermal conductivity of the structural glue is poor, which can easily cause local hot spots and affect the service life of the electricity core. Especially under high load working conditions, heat accumulation may cause the electricity core to overheat, thereby affecting the overall performance and safety of the battery pack. SUMMARY

[0003] In view of the above problems existing in the prior art, the technical problem to be solved by the utility model is to provide a battery module and battery pack which can simplify the structure, reduce the production cost, improve the convenience of disassembly and maintenance of the electricity core group, and improve the overall performance and safety.

[0004] The utility model solves the technical problem by adopting the following technical scheme: a battery module comprises:

[0005] An electricity core group comprises a plurality of electricity cores arranged in sequence, and a rigid insulating sheet is arranged between adjacent two electricity cores, so that the distance between the adjacent two electricity cores remains constant.

[0006] A fixing assembly comprises a first fixing structure and a second fixing structure, the first fixing structure is used for fixing the electricity core and the rigid insulating sheet, and the second fixing structure is detachably arranged on the electricity core group and can fix the electricity core group in the shell of the battery pack, wherein a first buffer structure is arranged between the second fixing structure and the electricity core group, the first buffer structure has a deformation amount allowing the electricity core group to move relative to the second fixing structure, and the electricity core and the rigid insulating sheet move synchronously when the electricity core group moves.

[0007] Further, the second fixing structure has at least three contact surfaces respectively opposite to different surfaces of the battery cell group, and the first buffer structure is arranged between the contact surfaces and the battery cell group.

[0008] Further, the second fixing structure comprises a first support and a second support arranged in cross, and the first support and the second support are both provided with at least three contact surfaces.

[0009] Further, the first support and the second support both comprise a first fixing edge, a second fixing edge and a third fixing edge connected vertically in sequence, and the contact surfaces are arranged on the side of the first fixing edge, the second fixing edge and the third fixing edge facing the battery cell group.

[0010] Further, the first fixing edge and the third fixing edge are further provided with a bending part, the bending part is provided with a first mounting hole penetrating through itself, and a fastener can pass through the first mounting hole to fix the battery cell group in the shell.

[0011] Further, the first support is provided with a first fixing hole, the second support is provided with a second fixing hole, and the first support and the second support are arranged in the first fixing hole and the second fixing hole, and a fastener can be arranged to fix the first support and the second support.

[0012] Further, the first buffer structure comprises a first buffer part and a second buffer part, the first buffer part is arranged between the first support and the battery cell group, the second buffer part is arranged between the second support and the battery cell group, and the first buffer part and the second buffer part are independent of each other.

[0013] The utility model solves its technical problem adopts the technical scheme, still provides a kind of battery pack, comprising:

[0014] Shell;

[0015] Battery cell group, the battery cell group includes a plurality of sequentially arranged battery cells, and a rigid insulating sheet is arranged between adjacent two battery cells, the rigid insulating sheet can keep the spacing of adjacent two battery cells constant;

[0016] Fixing assembly, the fixing assembly includes a first fixing structure and a second fixing structure, the first fixing structure is used to fix the battery cell and the rigid insulating sheet;The second fixing structure is detachably arranged on the battery cell group, and the battery cell group can be fixed in the shell of battery pack, wherein the second fixing structure and the battery cell group are provided with a first buffer structure, the first buffer structure has a deformation amount allowing the battery cell group to move relative to the second fixing structure, and the battery cell moves synchronously with the rigid insulating sheet.

[0017] Further, the second fixing structure is provided with a plurality of first mounting holes, the shell comprises a base, a plurality of first limiting structures are arranged in the base, the first limiting structures are provided with second mounting holes corresponding to the first mounting holes one by one, and fasteners can be arranged in the first mounting holes and the second mounting holes to fix the battery cell group in the base.

[0018] Further, the base has an opening, the shell comprises a shell cover detachably arranged on the opening, the shell cover is provided with a second limiting structure, and the second limiting structure is provided with a second buffer structure; when the battery cell group is fixed in the base, the second buffer structure abuts against the battery cell group.

[0019] Compared with the prior art, the battery module has at least the following beneficial effects:

[0020] 1、The battery module comprises a battery cell group comprising a plurality of battery cells and a fixing assembly comprising a first fixing structure and a second fixing structure, a rigid insulating sheet is arranged between the adjacent two battery cells, the battery cells and the rigid insulating sheet are fixed by the first fixing structure, the battery cell group is detachably fixed in a shell of a battery pack by the second fixing structure, and a first buffer structure is arranged between the second fixing structure and the battery cell group, so that the first buffer structure has a deformation amount allowing the battery cell group to move relative to the second fixing structure. The design not only simplifies the overall structure of the battery module, reduces the production cost, but also improves the convenience of disassembly and maintenance of the battery module.

[0021] 2、The second fixing structure has at least three contact surfaces respectively opposite to different surfaces of the battery cell group, and the first buffer structure is arranged between the contact surfaces and the battery cell group, so that the second fixing structure and the battery cell group are in multi-surface contact, which not only ensures the stability of the connection between the fixing assembly and the battery cell group, but also disperses the pressure through multi-surface contact, avoids local overload, prevents the battery cells from deforming or rupturing, and effectively improves the overall performance and safety of the battery module.

[0022] 3、The second fixing structure comprises a first support and a second support arranged in cross, and the first support and the second support are each provided with at least three contact surfaces, which enhances the rigidity and stability of the overall structure and effectively improves the impact resistance of the battery module. BRIEF DESCRIPTION OF DRAWINGS

[0023] Fig. 1 It is a structural schematic view of the battery module.

[0024] Fig. 2 It is an explosion view of the battery module.

[0025] Fig. 3It is a structure schematic view of the second fixing structure in the utility model.

[0026] Fig. 4 It is a structure schematic view of the battery pack in the utility model.

[0027] Fig. 5 It is an explosion view of the battery pack in the utility model.

[0028] Fig. 6 It is a structure schematic view of the shell in the utility model.

[0029] In all the drawings, same reference signs represent same technical features, specifically:

[0030] 100, cell group; 110, cell; 120, rigid insulating sheet; 200, first fixing structure; 300, second fixing structure; 310, first support; 311, first fixing edge; 312, second fixing edge; 313, third fixing edge; 314, bending part; 315, first fixing hole; 320, second support; 321, second fixing hole; 400, first buffer structure; 401, first buffer piece; 402, second buffer piece; 410, second buffer structure; 500, first mounting hole; 510, second mounting hole; 600, shell; 610, base; 611, first limiting structure; 612, opening; 620, shell cover; 621, second limiting structure; 700, CCS assembly. DETAILED DESCRIPTION

[0031] The following is a specific embodiment of the utility model and in combination with the drawings, the technical scheme of the utility model is further described, but the utility model is not limited to these embodiments.

[0032] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the utility model are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), if the specific posture changes, the directional indications also change accordingly.

[0033] In addition, in the utility model, the description such as "first", "second", "one" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0034] In the utility model, unless another definite provision and limitation, the terms "connect", "fix" and the like should be broad sense understanding, for example, "fix" can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through intermediate medium, can be two element internal communication or two element mutual action relation, unless another definite limitation.For ordinary skilled person in the art, the above terms can be understood according to the specific meaning in the utility model of specific circumstances.

[0035] In addition, the technical solutions of various embodiments of the utility model can be combined with each other, but it must be based on that ordinary skilled person in the art can realize, when the combination of technical solutions appears mutual contradiction or cannot be realized, it should be considered that the combination of technical solutions does not exist, also not within the protection scope required by the utility model.

[0036] As Figs. 1 to 3 Indicated, in the embodiment, including:

[0037] The electric core group 100 includes a plurality of electric cores 110 arranged in sequence, and a rigid insulating sheet 120 is arranged between the adjacent two electric cores 110, and the rigid insulating sheet 120 can keep the spacing of the adjacent two electric cores 110 constant;

[0038] The fixing assembly includes a first fixing structure 200 and a second fixing structure 300, the first fixing structure 200 is used for fixing the electric core 110 and the rigid insulating sheet 120, the second fixing structure 300 is detachably arranged on the electric core group 100 and can fix the electric core group 100 in the shell 600 of the battery pack, wherein the first buffer structure 400 is arranged between the second fixing structure 300 and the electric core group 100, the first buffer structure 400 has a deformation amount allowing the electric core group 100 to move relative to the second fixing structure 300, and the electric core 110 and the rigid insulating sheet 120 move synchronously when the electric core group 100 moves.In the design, through the design of the rigid insulating sheet 120, the compression force required after the plurality of electric cores 110 are stacked is reduced, so that the first fixing structure 200 does not need to use the steel belt of traditional design, and the production cost of the fixing assembly is effectively reduced.Through the detachable design of the second fixing structure 300, on the one hand, the electric core group 100 can be fixed in the shell 600 of the battery pack, and the end cover structure is saved, and the structure of the fixing assembly is simplified;On the other hand, the battery module can be conveniently disassembled and maintained, and the heat dissipation effect of the electric core group 100 can be improved, and the overall performance and safety of use of the battery module are guaranteed.Through the design of the first buffer structure 400, the electric core group 100 can have a certain deformation amount relative to the second fixing structure 300, not only can the expansion stress of the electric core 110 be dynamically absorbed to prevent the electric core 110 from being broken or deformed, but also the assembly tolerance of the battery module can be absorbed.

[0039] Specifically, such as Figs. 1 to 3 As shown, in this embodiment, the cell assembly 100 includes a plurality of sequentially arranged cells 110. Preferably, there are eight cells 110 arranged in a matrix to meet the high-power charging and discharging requirements of the battery pack. A rigid insulating sheet 120 is provided between adjacent cells 110, and the rigid insulating sheet 120 ensures that the spacing between adjacent cells 110 remains constant, meaning that the rigid insulating sheet 120 will not expand outwards after multiple cells 110 are pressed and stacked. Therefore, the design of the rigid insulating sheet 120 not only prevents short circuits between batteries but also reduces the clamping force required after multiple cells 110 are stacked.

[0040] In this embodiment, the rigid insulating sheet 120 is a PC sheet, PET sheet, PVC sheet, or PMMA sheet. Preferably, the rigid insulating sheet 120 is a PC sheet, which has high strength and high impact resistance, as well as excellent flame retardancy and electrical insulation. It is also not easily fatigued under repeated stress, exhibiting good durability and effectively ensuring the safety of the battery cell assembly 100 during use. Since the rigid insulating sheet 120 is a rigid material, it will not expand or contract. Compared to foam in traditional designs, it does not require excessive clamping force after the battery cells 110 are stacked, allowing the first fixing structure 200 to initially fix the battery cell assembly 100 using tape.

[0041] In this embodiment, the PC sheet is a polycarbonate sheet, which is a high-performance thermoplastic sheet made of polycarbonate resin.

[0042] In this embodiment, the battery module also includes a CCS component 700 disposed on one side of the electrode of the cell assembly 100. The CCS component 700 is welded to the electrode of each cell 110 to connect multiple cells 110 in series or in parallel to increase the output voltage or capacity of the battery module and to provide overcurrent and short circuit protection for the cell assembly 100 to ensure the safe operation of the battery module.

[0043] To secure the battery module within the battery pack housing 600, a fixing assembly is provided in this embodiment. This fixing assembly includes a first fixing structure 200 and a second fixing structure 300. The first fixing structure 200 is adhesive tape wrapped around the cell assembly 100 to stack multiple cells 110 and rigid insulating sheets 120 together. The second fixing structure 300 is detachably snapped onto the cell assembly 100, serving as a medium for connecting and fixing the cell assembly 100 to the battery pack housing 600, thus securing the cell assembly 100 as a whole within the battery pack housing 600.

[0044] In the embodiment, the first fixing structure 200 is a high-strength and high-toughness adhesive tape or a woven belt with elasticity, etc. Preferably, the first fixing structure 200 is an adhesive tape. Compared with the steel belt in the conventional design, the adhesive tape can not only significantly reduce the production cost, but also absorb the expansion force generated by the battery cell 110.

[0045] In the embodiment, the number of the first fixing structure 200 can be arranged as required. A single first fixing structure 200 with a larger width can be arranged at the middle of the battery cell group 100, or a plurality of first fixing structures 200 can be uniformly arranged on the upper and lower sides of the battery cell group 100. Preferably, in the embodiment, two first fixing structures 200 are arranged on the upper and lower sides of the battery cell group 100. This design effectively ensures the stability of the stacked battery cell group 100.

[0046] In the embodiment, the second fixing structure 300 can be a single U-shaped frame with at least three contact surfaces respectively opposite to different surfaces of the battery cell group 100. This design realizes the multi-surface contact between the second fixing structure 300 and the battery cell group 100, not only ensures the stability of the connection between the fixing assembly and the battery cell group 100, but also disperses the pressure through multi-surface contact to avoid local overload and prevent the battery cell 110 from deforming or rupturing, effectively improving the overall performance and safety of the battery module.

[0047] Preferably, in the embodiment, the area of each contact surface is less than one-third of the area of the corresponding surface of the battery cell group 100. This design leaves more space on the surface of the battery cell group 100 for air circulation, improves the heat dissipation conditions, and reduces the risk of heat accumulation.

[0048] In the embodiment, the second fixing structure 300 includes a U-shaped first support 310 and a U-shaped second support 320 arranged in a cross shape, and at least three contact surfaces are arranged on the first support 310 and the second support 320. This design ensures stable connection between the second fixing structure 300 and the battery cell group 100 even if the area of each contact surface is small, preventing the module from shaking or loosening. Compared with the arrangement of a single support, the rigidity and stability of the overall structure are enhanced, effectively improving the impact resistance of the battery module and further improving the overall performance of the battery module.

[0049] In the embodiment, the lengths of the first support 310 and the second support 320 are different, and both include a first fixing edge 311, a second fixing edge 312, and a third fixing edge 313 connected vertically in sequence, and the contact surfaces are arranged on the side of the first fixing edge 311, the second fixing edge 312, and the third fixing edge 313 facing the battery cell group 100. This design effectively simplifies the manufacturing process of the second fixing structure 300, while ensuring the rigidity and stability of the support and ensuring that the battery cell group 100 can be stably fixed in the shell 600.

[0050] In the embodiment, the first fixed edge 311 and the third fixed edge 313 are oppositely arranged, and the first fixed edge 311 and the third fixed edge 313 are further provided with a bending portion 314 at one end away from the second fixed edge 312, and the bending portion 314 is provided with a first mounting hole 500 penetrating through itself, and the fastener can pass through the first mounting hole 500 to fix the battery cell group 100 in the shell 600. By adding the bending portion 314, the overall rigidity and bending resistance of the first fixed edge 311 and the second fixed edge 312 can be significantly enhanced, so that they can withstand greater external force without being easily deformed or damaged, and the structural strength and stability of the entire second fixed structure 300 are improved. In addition, the mounting position and manner of the fastener are also optimized to ensure convenient and firm connection between the second fixed structure 300 and the shell 600, preventing loosening or falling off due to vibration or impact.

[0051] Preferably, in the embodiment, the bending portion 314 is integrally formed with the first fixed edge 311 and the third fixed edge 313, and the first mounting hole 500 penetrates the bending portion 314 in the vertical direction. The design of integral molding eliminates the connection points, improves the overall rigidity and stability of the structure, and makes it more capable of bearing various mechanical stresses from the outside.

[0052] In the embodiment, the first support 310 and the second support 320 are detachably connected by the fastener, wherein the first support 310 is provided with a first fixed hole 315, and the second support 320 is provided with a second fixed hole 321, when the first support 310 and the second support 320 are cross arranged, the first fixed hole 315 and the second fixed hole 321 are aligned, and the fastener can be arranged in the first fixed hole 315 and the second fixed hole 321 to fix the first support 310 and the second support 320. This design not only ensures the firmness of the connection between the first support 310 and the second support 320, but also improves the convenience of disassembly and maintenance of the two.

[0053] Preferably, in the embodiment, the second fixed structure 300 is provided with two groups, and the number thereof is adapted to the number of columns of the battery cell 110.

[0054] In the embodiment, since the rigid insulation sheet 120 is used between each battery cell 110 of the battery cell group 100, in order to meet the expansion requirement of the battery cell 110 during charging and discharging, the first buffer structure 400 is arranged between the second fixed structure 300 and the battery cell group 100, and the first buffer structure 400 has a deformation amount allowing the battery cell group 100 to move relative to the second fixed structure 300. The design of the first buffer structure 400 can dynamically absorb and release the stress caused by the expansion of the battery cell 110, preventing the battery cell 110 from being broken or deformed due to excessive extrusion. At the same time, the existence of the first buffer structure 400 also provides more flexibility and adjustment space for assembly, which can absorb the assembly tolerance of the battery module, effectively improving the quality and consistency of the overall assembly.

[0055] In the embodiment, the first buffer structure 400 comprises a first buffer piece 401 and a second buffer piece 402, the first buffer piece 401 is arranged between the first support 310 and the battery cell group 100, the second buffer piece 402 is arranged between the second support 320 and the battery cell group 100, and the first buffer piece 401 and the second buffer piece 402 are independent of each other. The design makes the first buffer piece 401 and the second buffer piece 402 can act independently, and respectively cope with different working conditions, wherein the first buffer piece 401 can be used to absorb the assembly tolerance generated when the battery module is assembled in the shell 600, and the second buffer piece 402 is used to dynamically absorb and release the stress generated by the expansion or contraction of the battery cell group 100 due to charging and discharging. The design ensures the independence of the assembly tolerance and the stress absorption, and ensures the absorption effect of both.

[0056] In the embodiment, the first buffer structure 400 is a foam or a silica gel pad or a polyurethane foam or a heat-conducting gel. Preferably, the first buffer structure 400 is a foam. It not only has good compression recovery, but also can significantly reduce the production cost of the battery module, and meet the demand of lightweight design of the battery module.

[0057] As shown in Figs. 1 to 6 , the utility model embodiment still provides a kind of battery pack, comprising:

[0058] Shell 600;

[0059] Battery cell group 100, it includes a plurality of sequentially arranged battery cell 110, and rigid insulating sheet 120 is arranged between adjacent two battery cell 110, the rigid insulating sheet 120 can keep the spacing of adjacent two battery cell 110 constant;

[0060] Fixed assembly, it includes first fixed structure 200 and second fixed structure 300, the first fixed structure 200 is used to fix battery cell 110 with rigid insulating sheet 120;Second fixed structure 300 is detachably arranged on battery cell group 100, and can fix battery cell group 100 in the shell 600 of battery pack, wherein, first buffer structure 400 is arranged between second fixed structure 300 and battery cell group 100, the first buffer structure 400 has the deformation amount that allows battery cell group 100 to move relative to second fixed structure 300, and when battery cell group 100 moves, battery cell 110 and rigid insulating sheet 120 move synchronously. The design significantly reduces the production cost of battery pack, improves the convenience of disassembly and maintenance of battery pack, and also guarantees the overall performance and safety of use of battery pack.

[0061] In the embodiment, the shell 600 comprises a base 610 and a shell cover 620 which are detachably connected. The base 610 is in a rectangular shape, is a hollow structure, and has an opening 612 for placing the battery module. The shell cover 620 is detachably arranged on the opening 612, so as to realize sealing of the shell 600 and ensure safety of the battery module.

[0062] In the embodiment, a plurality of first limiting structures 611 are arranged in the base 610, each of the first limiting structures 611 is provided with a second mounting hole 510 corresponding to the first mounting hole 500, and the fastener can be arranged in the first mounting hole 500 and the second mounting hole 510 to fix the cell group 100 in the base 610. The design of the first limiting structure 611 not only provides a fixed fulcrum for the cell group 100, ensures stability of the cell group 100 in the base 610, and prevents displacement of the cell group 100 due to vibration or impact, but also realizes positioning of the installation position of the cell group 100, so as to ensure accurate alignment and fixation of the cell group 100 at the predetermined position during installation, and improve installation precision and consistency.

[0063] In the embodiment, a plurality of first mounting holes 500 are arranged on the second fixing structure 300 and are respectively located on the plurality of bending portions 314.

[0064] In the embodiment, the shell cover 620 is provided with a second limiting structure 621, and the second limiting structure 621 is provided with a second buffering structure 410; when the cell group 100 is fixed in the base 610, the second buffering structure 410 abuts against the surface of the cell group 100. Through arrangement of the second limiting structure 621, the battery module can be stably fixed in the base 610, so as to prevent shaking or loosening of the battery module, and further improve stability of the battery module after installation. The second buffering structure 410 can absorb external impact energy, reduce direct impact on the cell group 100, and improve overall safety of the battery pack.

[0065] In the embodiment, the second buffering structure 410 is a foam or a silica gel pad or a polyurethane foam or a heat-conducting gel. Preferably, the second buffering structure 410 is a foam.

[0066] Since the specific structure of the cell group 100 and the fixing assembly has been described in detail in the foregoing content, the same content will not be described again hereinafter.

Claims

1. A battery module, characterized in that, include: A battery cell assembly (100) includes a plurality of sequentially arranged battery cells (110), and a rigid insulating sheet (120) is provided between two adjacent battery cells (110), the rigid insulating sheet (120) can keep the spacing between two adjacent battery cells (110) constant; A fixing assembly includes a first fixing structure (200) and a second fixing structure (300). The first fixing structure (200) is used to fix the battery cell (110) to the rigid insulating sheet (120). The second fixing structure (300) is detachably disposed on the battery cell assembly (100) and can fix the battery cell assembly (100) in the housing (600) of the battery pack. A first buffer structure (400) is provided between the second fixing structure (300) and the battery cell assembly (100). The first buffer structure (400) has a deformation that allows the battery cell assembly (100) to move relative to the second fixing structure (300), and when the battery cell assembly (100) moves, the battery cell (110) and the rigid insulating sheet (120) move synchronously.

2. A battery module according to claim 1, characterized in that, The second fixing structure (300) has at least three contact surfaces that are respectively opposite to different surfaces of the battery cell assembly (100), and the first buffer structure (400) is disposed between the contact surfaces and the battery cell assembly (100).

3. A battery module according to claim 2, characterized in that, The second fixing structure (300) includes a first bracket (310) and a second bracket (320) arranged in a cross pattern, and both the first bracket (310) and the second bracket (320) are provided with at least three contact surfaces.

4. A battery module according to claim 3, characterized in that, Both the first bracket (310) and the second bracket (320) include a first fixed side (311), a second fixed side (312) and a third fixed side (313) connected vertically in sequence, and the contact surface is located on the side of the first fixed side (311), the second fixed side (312) and the third fixed side (313) facing the battery cell assembly (100).

5. A battery module according to claim 4, characterized in that, The first fixed edge (311) and the third fixed edge (313) are further provided with a bent portion (314) at the end away from the second fixed edge (312). The bent portion (314) is provided with a first mounting hole (500) that passes through itself, and the fastener can pass through the first mounting hole (500) to fix the battery cell assembly (100) in the housing (600).

6. A battery module according to claim 3, characterized in that, The first bracket (310) and the second bracket (320) are detachably connected. The first bracket (310) is provided with a first fixing hole (315), and the second bracket (320) is provided with a second fixing hole (321). Fasteners can be inserted into the first fixing hole (315) and the second fixing hole (321) to fix the first bracket (310) and the second bracket (320).

7. A battery module according to claim 3, characterized in that, The first buffer structure (400) includes a first buffer (401) and a second buffer (402). The first buffer (401) is disposed between the first support (310) and the battery cell assembly (100), and the second buffer (402) is disposed between the second support (320) and the battery cell assembly (100). The first buffer (401) and the second buffer (402) are independent of each other.

8. A battery pack, characterized in that, include: Casing (600); A battery cell assembly (100) includes a plurality of sequentially arranged battery cells (110), and a rigid insulating sheet (120) is provided between two adjacent battery cells (110), the rigid insulating sheet (120) can keep the spacing between two adjacent battery cells (110) constant; A fixing assembly includes a first fixing structure (200) and a second fixing structure (300). The first fixing structure (200) is used to fix the battery cell (110) to the rigid insulating sheet (120). The second fixing structure (300) is detachably disposed on the battery cell assembly (100) and can fix the battery cell assembly (100) in the housing (600) of the battery pack. A first buffer structure (400) is provided between the second fixing structure (300) and the battery cell assembly (100). The first buffer structure (400) has a deformation that allows the battery cell assembly (100) to move relative to the second fixing structure (300), and when the battery cell assembly (100) moves, the battery cell (110) and the rigid insulating sheet (120) move synchronously.

9. A battery pack according to claim 8, characterized in that, The second fixing structure (300) is provided with a plurality of first mounting holes (500). The housing (600) includes a base (610). The base (610) is provided with a plurality of first limiting structures (611). The first limiting structures (611) are provided with second mounting holes (510) that correspond one-to-one with the first mounting holes (500). Fasteners can be inserted into the first mounting holes (500) and the second mounting holes (510) to fix the battery cell assembly (100) in the base (610).

10. A battery pack according to claim 9, characterized in that, The base (610) has an opening (612), and the housing (600) includes a cover (620) detachably disposed on the opening (612). The cover (620) is provided with a second limiting structure (621), and the second limiting structure (621) is provided with a second buffer structure (410). When the battery cell assembly (100) is fixed in the base (610), the second buffer structure (410) abuts against the battery cell assembly (100).

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